Wall construction for refrigerators



D. 1. WALKER WALL CONSTRUCTION FOR REPRIGERATORS Filed May '7, 1926INVENTOR .DAvm ISRA El. WALKER 71% 6.!

ATTORMFYS Patented Nov. 22, 1927-.

UNITED. STATES,

nAvIn ISRAEL WALK-ER, or V NCOUVER, BRITISH COLUMBIA, CANADA.

WALL CONSTRUCTION FOR REFRIGEEJR ACIORS.

Application filed May-7, 1926. Serial No. 107,445.

This invention relates to the construction of the containing walls andce1l1ng of a refrigerator chamber wherebv the same are renderednon-conductive to heat, with the resultant economy in the-use of thecooling agent or refrigerating means.

The device comprises a means taining a still air space within the wallsand for sealing said, air space against the pas 1a sage of air bypercolation or otherwise.

While it is generally recognized that a. still air space is one of themost satisfactory non-conductors of heat and the same has been embodiedin refrigerator walls, is sufficientcare is not taken to guard againstair percolation inward from without, or outward from within, and as aconsequence the full advantages of the air space are not obtained. Intheconstruction set forth in this application the walls are of heatnon-conducting material, such as dry Wood, strong paper and the like,but as such are to a greater or less extent permeable, I enclose thembetween linings of sheet metal, one on each side of the air space,taking care to ensure that the corners of the walls, floor and theceiling are carefully closed with paper layers.

The metal being impermeable to air, the

so integrity of the air space is maintained against percolationf andwith the further advantage that the walls are protected againstpenetration by vermin, such as rats or mice.

The particular means by which these several results are attained arefully set forth in the following specification, reference being made tothe drawings by which it is accompanied, in which:

10 Fig. 1 is a perspective view of a corner of a chamber showing thewall in horizontal and vertical section, and the manner of in.- foldingthe flexible strata such as paper or sheet metal.

F ig. 2 is a perspective view of the angle covering strip of paper.

In the drawings like characters of reference indicate correspondingparts in each figure.

In these drawings 2 represents the space within the chamber and 3constitutes the studding of any suitable size by which the Width of theair space 4: is maintained. To the inner side of the studding 3 aresecured two separate sheathings 5 and 6 of shiplap,

for mainand about three-quarters of an inch thick, the joints of whichbreak with one another, between which one or more layers of tarred orother suitable paper 7 is laid with its joints broken as at 8,suchjoints being further covered with an angle covering strip, 9. Theanglecoverlng strip 1s formed of one or more layers o-f paper 10, see Figure 2,

folded longitudinally about a medial line as at 11 to form a right anglestrip 12, the 3 extremities of the strip being infolded to form an end13 for the purpose of'preventing the passage of air between the layersof material at the corners of the chamber.

On the inner side of the shiplap 6 two In layers of paper 14 which breakjoint with one another, and a sheathing 15 of sheet metal are secured tothe shiplap 6 by nails through the'sheet metal into the shiplap and tothe inner face of the metal sheathing d 15 is applied a finishing layer16 of beaver board. 7

To the outer side of the studding '3 are nailed two thicknesses 17 and18 of shiplap, between which one or more layers of paper HF 19 withbroken jointsand an angle strip 9 are placed, and outside that twolayers of paper 20 are placed which are in turn covered preferably witha further layer of shiplap 21 if particular good insulation W againstheat is required, though this may be omitted if low temperatures are notrequired to be maintained in the chamber. The outer layer of shiplap iscovered with a further layer of paper 22 which is lapped to at theangles and provided with a further angle strip 9 when an outsidecovering of metal 23 is applied by nailing to the shiplap.

The air space 4 is thus protected not only by the heat non-conductingshiplap, the as double layers of joint breaking paper and I the beaverboard, but as these materials are to a certain extent permeable, it isfurther protected by impermeable sheathing of metal on each side of theair space.

The sheet metal is not only impermeable to the passage of air throughit, but protects the wall against penetration by vermin, such as rats ormice, which have been known to penetrate and ruin a refrigerator eitherfrom without or from within when having obtained access through the doorwhen in advertently left open.

It is, however, little use in providing and introducing laminae thatwill prevent percolit) lation of air if care is not taken to see thatthe air spaces are properly closed at the corners of the room.

The flexible strata of paper and sheet metal is, at the junction of thecorners at the ceiling and the floor, folded in a manner that willprevent escape of air from the air pockets outward, or on the outer sideadmission of air inward to the pockets.

The particular means by which the joints are broken or lapped does not,however, form a material point in this application SO long as care istaken to close the ends of the air spaces with the flexible materialembodied in the wall.

\Vhat I claim as my invention is:

1. A wall construction for refrigerator chambers comprising opposinglayers of wood defining an air space, layers of flexible material suchas paper on one or both sides of the wood, said layers being continuedto and breaking joints with similar layers of an intersecting wall, aloi'igitudinal angle strip of flexible material having closed or foldedends covering the intersection and an outer metal covering for theflexible material. V

2. A refrigerator wall construction formed with an air space; each wallof layers of paper interposed between adjacent layers of shiplap andbetween the shiplap and the metal covering and angle strips exwhichconsists of an outer covering of sheet 30 metal, inner layers ofshiplap, one or more

